Twin City MPQN/MPQS Modular Plenum Fans - ES-110 - Manual (Page 4)

4 Twin City Engineering Supplement ES-110
Operation Check List
Verify.that.proper.safety.precautions.have.been.followed:
□.Electrical.power.must.be.locked.off.
Check.fan.mechanism.components:
□ System.connections.are.properly.made.and.tightened..□
□ Bearings.are.properly.lubricated.
□ Wheel,.drives.and.fan.surfaces.are.clean.and.free...
..of.debris.
□ Rotate.the.impeller.by.hand.to.verify.it.has.not.shifted.
..in.transit.
□ Check.fan/wheel.overlap..(See.Figure.3.)
Check.fan.electrical.components:
□ Motor.is.wired.for.proper.supply.voltage.
□ Motor.was.properly.sized.for.power.and.rotational..
..inertia.of.rotating.assembly.
□ Motor.is.properly.grounded.
□ All.leads.are.properly.insulated.
Trial.“bump”:
□ Turn.on.power.just.long.enough.to.start.assembly..
..rotating.
□ Check.rotation.for.agreement.with.rotation.arrow..
. Does. the. assembly. make. any. unusual. noise?..
..(See.Figure.4.)
□ Correct.any.problems.which.may.have.been.found..
..(Follow.safety.guidelines.-.shut.power.off.).Perform...
..checklist.again.until.unit.is.operating.properly.
□ Run.unit.up.to.speed.
Verify.fastener.tightness..These.may.have.loosened.dur-
ing.shipment.or.installation.
□ Setscrews.attaching.wheel.hub.to.shaft.
□ Nuts.on.inlet.funnel.
□ Nuts.and.bolts.holding.motor.
□ Nuts.holding.housing.frame.to.base.and.base.to.
..ground.
□ Bolts.in.taper-lock.bushings.
□ Grease.line.connections.
After.one.week.of.operation,.check.all.nuts,.bolts.and.
setscrews.and.tighten.if.necessary.
Maintenance of Fans
This. section. contains. general. maintenance. instructions.
for.your.Twin.City.Fan.&.Blower.unit..For.specific.infor-
mation. about. maintenance. of. components,. particularly.
for.special.application.fans,.see.the.attached.documents.
General Motor Maintenance
The.three.basic.rules.of.motor.maintenance.are.keep.the.
motor.clean,.dry.and.properly.lubricated.
. Keeping. motors. and. windings. clean. is. important.
because.dirt.and.dust.serve.as.thermal.insulators..Heat.
normally. dissipated. by. the. motor. is. trapped. causing.
overheating.and/or.premature.failure..Blow.dust.and.dirt.
out.of.windings.and.off.the.motor.periodically..Use.low.
pressure.(50.psig).airstream.so.that.winding.damage.does.
not. occur.. Keep. the. area. surrounding. the. motor. open.
so. the. air. can. circulate. through. the. motor. cooling. fan..
Follow.normal.maintenance.schedule.given.to.the.right.
. Motors. should. be. kept. dry. to. avoid. electrical. short.
circuits..Motors.kept.in.storage.for.long.periods.of.time.
can.have.moisture.condense.on.the.windings..Be.certain.
the.motor.is.dry.before.using.
.
A
DIA
B
Figure 3. Wheel-Funnel Overlap
Size A B Size A B
122 13.00 0.25 270 28.11 0.55
150 14.13 0.25 300 31.23 0.61
165 16.16 0.25 330 34.36 0.67
182 19.00 0.38 365 38.00 0.75
200 20.82 0.41 402 41.90 0.82
222 23.16 0.45 445 46.33 0.91
245 25.51 0.50 490 51.01 1.00
MPQN/MPQS
BAF, BAE, EPF, EPQ,
MPQN, MPQS, APF & APQ
Wheels
Rotation
Figure 4. Proper Wheel Rotation